/**
 * @author Jason Tong
 * @date 2019/4/29 11:17.
 */
public class CodeStandard {
    public static void main(String[] args) {
        final int la = 20;
        StringBuffer buffer = new StringBuffer();
        buffer.append('S');
        buffer.append("tringBuffer");
        System.out.println(buffer.charAt(1));
        System.out.println(buffer.capacity());
        System.out.println(buffer.indexOf("tring"));
        System.out.println("buffer = " + buffer.toString());
        if (buffer.capacity() < la)
            buffer.append("1234567");
        for (int i = 0; i < buffer.length(); i++)
            System.out.println(buffer.charAt(i));



    }
}